NAME

Proc::PidUtil - PID file management utilities

SYNOPSIS

  use Proc::PidUtil qw(
        if_run_exit
        is_running
        make_pidfile
        zap_pidfile
        get_script_name
        :all
  );

DESCRIPTION

Proc::PidUtil provides utilities to manage PID files

$rv = if_run_exit('path',$message);
This routine checks for a file named:
```
  '(scriptname).pid
```
in the the $path directory. If a file is found and the PID found in the file is currently a running job, there is no return, the subroutine prints the (scriptname): $pid, $message to STDERR and exits.

If there is no file or the PID does not match a running job, run_exit returns true.
```
  input:        path for pidfiles
  return:       true if not running
                else exits
```
Note: also exits if $path is false
$rv = is_running('path2pidfile');
Check that the job described by the pid file is running.
```
  input:        path 2 pid file
  returns:      pid or false (0) if not running
```

$rv = make_pidfile('path2pidfile',$pid);
Open a pid file and insert the pid value.

  input:        path 2 pid file,
                pid value || $$
  returns:      pid or false (0) on error

$rv = zap_pidfile($path);

  input:        path for pidfiles
  returns:      return value of 'unlink'

$me = get_script_name();
This function returns the script name portion of the path found in $0;

  input:        none
  returns:      script name

  i.e.  if the script name is:
  /usr/local/stuff/scripts/sc_admin.pl

  $me = get_script_name();

  returns ('sc_admin.pl')

DEPENDENCIES

        none


=head1 EXPORT_OK

        if_run_exit
        is_running
        make_pidfile
        zap_pidfile
        get_script_name

EXPORT_TAGS

        :all

COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

AUTHOR

Michael Robinton <michael@bizsystems.com>